Ore-jigger.



W. M. WILLIAMS.

ORE JIGGBR.

APPLIOATION FILED DBO. a. 190s.

Patented June 8, 1909.

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WILLIAM M. WILLIAMS, OF GRIDLEY, CALIFORNIA, ASSIGNOR OF ONE-HALF TO J.L. MINTS,

- OF GRIDLEY, CALIFORNIA.

ORE-JIGGER.

Specification of Letters Patent.

Patented June 8, 1909.

Application led December 8, 1908. Serial No. 466,516. Y

To all whom t may concern.'

VBe it known that I, WILLIAM M. WILLIAMS, a citizen of the UnitedStates, residing at Gridley, in the county of Butte and State ofCalifornia, have invented a new and useful Ore-digger, of which thefollowing is a specification.

- This invention relates to ore jiggers of the reciprocating screentype, and has for its object to provide an improved screen structure,and also to augment the upward How of the water through the screen, inorder to effect a better and more rapid separation.

Vith these objects in view, the invention consists in a novelconstruction and arrangement of parts to be hereinafter described andclaimed, reference being had to the drawing hereto annexed in which-Figure 1 is an elevation of the apparatus, partly in section. Fig. 2 isan enlarged sectional detail of the screen bottom of the jig-box. Fig. 3is a transverse section on the line 3 3 of Fig. 1.

Referring more particularly to the drawing, 5 denotes the tank in whichthe jig-box 6 works. The tank is filled with water, and the jig-box isreciprocated therein as usual. The resistance of the water, as the boxdescends, lifts up the ore, and the particles assort themselves as theysettle back, the denser particles being arranged in strata under theless dense.

The j ig-box is suspended in the tank from one end of the lever 7 whichis fulcrumed at 8 on standards 9 rising from the tank. To each end ofthe jig-box is pivoted a link 10 which is connected to a hook 11 carriedby and depending from the lever. On each end of the jig-box is alsomounted a bracket 12 having a segmental slot 13 in which works a pin 14:carried by and projecting from the links, whereby the movement of thebox is regulated.

In the bottom 15 of the jig-box, are outwardly tapering perforations 16,and on said bottom, on the inside of thebox, is mounted a double screen17 bedded with a layer 1S of granular material, on top of which isarranged a grating comprising rods 19 which ext-end lengthwise of thebox, and are secured at their ends to the end walls thereof in anysuitable manner. The granular `material is preferably chilled shot. Thisstructure forms a screen which is strong and durable, and which effectsa thorough separation.

In the tank, below the jig-box, is mounted a trough 20 which is properlydiinensioned to receive the concentrates dropping through the screenbottom of the j ig-box. The jigbox works adjacent to the forward end ofthe tank, and the trough extends to that end, but is spaced from theopposite end of the tank. The bottom of the trough slopes downwardly inthe direction of the last mentioned end of the tank, and the trough isalso open at that end. To the bottom of the trough, at its open end, ishinged at 21, to swing in a vertical plane, a gutter 22 which worksbetween said end of the trough and the adjacent end wall of the tank.The

gutter is connected by an arm 23 to a link Y 24 carried by a stein 25secured to and depending from the lever 7, the stem being connected tothe lever on that side of its fulcrum opposite to that from which thejig box is hung. By reason of this connection between the gutter and thelever, it will be seen that when said lever is swung to reciprocate thejig box, the gutter will swing upwardly on its hinge every time the jigbox descends, whereby a current of water is forced into the spacebetween the trough and the bottom of the jig-box, and upwardly throughthe screen, the action being similar to that in the type of jiggershaving a stationary screen, through which the water is caused to pulsateby a plunger. By thus combining the actions of the two types ofapparatus, a better and more rapid separation is effected. The gutter 22also serves as a valve closing the space between the trough and the tankwalls, and timed to close at the same time the jig box descends, wherebythe forcing out of the liquid by the box is prevented; then when the boxascends, this valve trough drops, and discharges its contents below thetrough, and permits a moderate discharge of water and material throughthe pipe 26 to the sluice 27.

The concentrates passing through the screen, drop on the trough 20, andwork down the same into the gutter 22, from which they are dischargedover the .ends there onto the bottom of the tank. The sand and water isdischarged through a pipe 26 leading to a sluice 27 which is locatedoutside the tank, and which is V-shaped in cross-section as clearlyshown in Fig. 3 of the drawings, and bedded with shot or an)T othersuitable material 28 for catching particles heavier than water, theobject being to save the iiner particles of ore. By making theperforations l5 tapering the concentrates passing through the screen aremore evenly distributed.

That is claimed is:

l. The combination 'with a tank, a jig-box working therein, and meansfor operating the jig-box, a trough in the tank below the jig-box, saidtrough being open at one end, and the bottom of the trough sloping inthe direction of said open end, a gutter hinged to the open end of thetrough and fitting between said end and the adjacent wall of the tank,and a connection between the gutter and the aforesaid jig-boxoperating-means.

2. The combination with a tank, a jig-box working therein, and means foroperating the jig-box, of a trough in the tank below the jig-box, agutter hinged at one of its longitudinal edges to the discharge end ofthe trough and itting between said edge and the adjacent wall of thetank, and means for rocking the gutter.

In testimony thatl I claim the foregoing as my own, I have hereto aiixedmy signuture in the presence of two witnesses.

WILLIAM M. VILLAMS.

W'itnesses H. M. SERKLAND, RAY YV. SEAGER.

